Injen has finally released the long awaited SP series cold air intake system for the 2008-2013 Subaru Impreza WRX and STI 2.5 (part # SP1204 ). The SP1204, featuring a DRY ea nanofiber filter, yields an astonishing 38hp and 39 tq! After several months of solid R&D, we are confident to say that the SP1204 is by and far the best complete cold air intake system available for this vehicle, yielding superior horsepower results and flow increases. You'll see from the photo above, that the Injen Cold Air Intake for the 2008-2013 Subaru Impreza WRX and STI 2.5 comes with more than just a pipe and a filter. Your mass air flow sensor bolts right up to it for a flawless install, it includes additional piping upgrades, a heat shield, a DRY EA Nanofiber air filter, and more!

What Makes Injen Intakes better than their competition?Not only are all Injen Technology Intakes made in the USA, Injen cool air intake systems feature MR Technology, developed by Injen to maintain safe air/fuel ratio and highly efficient tuning. Injen also does extensive dyno tuning and r&d before releasing an intake, unlike many other companies who take an "if it fits, use it" attitude to aftermarket intakes.

New Level Motorsports is an Injen Direct Authorized dealer.

The part number for this item is SP1204P and it fits 2008-2013 Subaru Impreza WRX and STI 2.5 models, yielding massive gains of 38hp and 38tq..

Introducing a colorful peace of mind.

Ever worry about water getting into your cold air intake system? For that added protection during those unsure moments, Injen Technology’s HYDRO-SHIELD PRE-FILTERS are race proven material manufactured from highly durable polyester. Uniform micron openings allow the filtering of debris .005” or larger. The HYDRO-SHIELD PRE-FILTERS are factory treated using an embedded hydrophobic process, which offers consistent airflow, water repellency and maintains horsepower gains. (Please note that this item is water repellent, not water proof).

Basically, the Injen hydroshield is a water shield and prefilter for your air intake system. It will allow air through and block water and large dirt particles, protecting your car and keeping your filter cleaner.

We get this question all the time… Which Injen Air Filter should I pick??

Here at New Level Motor Sports we like to provide you with options. That’s why we are one of the only Injen retailers who gives YOU the choice as to which Injen filter you want: The Injen Oiled Filter (K&N Style) or the Injen/AMSOIL Dry Filter.

Injen Intake Systems are available with two different kinds of filters: Dry and Oiled. The Injen Oiled filter is a K&N Style filter. It is a pleated filter that features 5 layers of filtration. It allows for significantly more air flow than OE air filters. The filtration rate on oiled filters is over 98%. Oiled filters need to be cleaned periodically (every 10-20k miles, depending on the conditions you drive in) and will need to be reoiled after the cleaning. You can purchase a cleaning kit from an auto parts store, or we sell the cleaning kit here on our website.

The Injen/AMSOIL Dry is an oiless filter that can be cleaned with a shop vac, which makes cleaning much easier than the oiled filter. The filtration on the dry filters is over 99%, so they are slightly more efficient in terms of filtration.

There is no difference in horsepower or torque between the wet and dry filters. The main difference is your personal preference. Some people love the oiled filters and others love the dry filters. Either one is going to work fine and they are 100% interchangeable (if you have a dry filter and later want to replace it with an oiled filter or vice versa you can do so).

We recommend the dry filter over the oiled filter due to its ease of cleaning and slightly better filtration. Also, with a dry filter you don't risk fouling your mass air flow sensor by over oiling an oiled filter during cleaning.